[google_maps_flutter_ios] expose map call hander interface

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapController.h

@@ -31,4 +31,13 @@ NS_ASSUME_NONNULL_BEGIN
 - (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar;
 @end
 
+/// Implementation of the Pigeon maps API.
+///
+/// This is a separate object from the maps controller because the Pigeon API registration keeps a
+/// strong reference to the implementor, but as the FlutterPlatformView, the lifetime of the
+/// FLTGoogleMapController instance is what needs to trigger Pigeon unregistration, so can't be
+/// the target of the registration.
+@interface FGMMapCallHandler : NSObject <FGMMapsApi>
+@end
+
 NS_ASSUME_NONNULL_END

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapController.m

@@ -64,21 +64,12 @@ - (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar
 
 #pragma mark -
 
-/// Implementation of the Pigeon maps API.
-///
-/// This is a separate object from the maps controller because the Pigeon API registration keeps a
-/// strong reference to the implementor, but as the FlutterPlatformView, the lifetime of the
-/// FLTGoogleMapController instance is what needs to trigger Pigeon unregistration, so can't be
-/// the target of the registration.
-@interface FGMMapCallHandler : NSObject <FGMMapsApi>
+/// Private declarations of the FGMMapCallHandler.
+@interface FGMMapCallHandler ()
 - (instancetype)initWithMapController:(nonnull FLTGoogleMapController *)controller
                             messenger:(NSObject<FlutterBinaryMessenger> *)messenger
                          pigeonSuffix:(NSString *)suffix;
-@end
 
-/// Private declarations.
-// This is separate in case the above is made public in the future (e.g., for unit testing).
-@interface FGMMapCallHandler ()
 /// The map controller this inspector corresponds to.
 @property(nonatomic, weak) FLTGoogleMapController *controller;
 /// The messenger this instance was registered with by Pigeon.

packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapController_Test.h

@@ -4,11 +4,14 @@
 
 #import <Flutter/Flutter.h>
 #import <GoogleMaps/GoogleMaps.h>
+
 #import "FGMCATransactionWrapper.h"
+#import "GoogleMapController.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface FGMMapCallHandler : NSObject <FGMMapsApi>
+/// Exposes internal properties of FGMMapCallHandler for unit testing.
+@interface FGMMapCallHandler (Test)
 
 /// Transaction wrapper for CATransaction to allow mocking in tests.
 @property(nonatomic, strong) id<FGMCATransactionProtocol> transactionWrapper;